US20030161336A1 - Network management system for designating a communications gateway between domains - Google Patents
Network management system for designating a communications gateway between domains Download PDFInfo
- Publication number
- US20030161336A1 US20030161336A1 US10/367,924 US36792403A US2003161336A1 US 20030161336 A1 US20030161336 A1 US 20030161336A1 US 36792403 A US36792403 A US 36792403A US 2003161336 A1 US2003161336 A1 US 2003161336A1
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- US
- United States
- Prior art keywords
- management system
- network management
- gateways
- network
- gateway
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/04—Interdomain routing, e.g. hierarchical routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
Definitions
- the present invention relates to sending data packets out from a data network. It applies particularly well to Internet type networks.
- the gateway is a border router which has means for communicating both with routers that are internal to the network in question, and with routers of other networks, generally other border routers.
- the node originating transmission of the data packet therefore needs to know the address of the border router gateway.
- This address may be known either by configuration, or by interrogating a domain name server (DNS).
- DNS domain name server
- this gateway plays a critical role in sending data packets between two domains.
- the gateway must be capable of handling all of the traffic sent between the two domains. This traffic can be large and can lead to the gateway becoming overloaded, with the consequence of a reduction in transmission performance between the two domains.
- the gateway may suffer a hardware or software failure, and no longer be capable of sending data packets from one domain to another. In such a situation, traffic becomes impossible between the two domains.
- the object of the invention is to solve that pair of problems by proposing that a plurality of gateways be arranged to send data packets between the two domains.
- the invention provides a network management system having means for obtaining information about equipment in the network, some of the equipment being constituted by gateways suitable for enabling traffic to be sent out from the network.
- the network management system includes means for sending, to the domain name server associated with the network, the address(s) of one or more of said gateways as determined on the basis of said information.
- said means are arranged to order a list of gateways prior to sending the list to the domain name server.
- said means implement a dynamic update command to send the address(es).
- This command may be designed to contain a list of addresses. For example, it may be a command of the “DNS update” type in accordance with RFC 2136.
- either the domain name server or the router originating the transmission can decide on the “best” gateway for allowing data packets to be sent to the second domain. This makes it possible to avoid sending data packets via a gateway that has failed or that is overloaded. It is also possible to spread loading over a set of available gateways.
- a router R 1 of domain N 1 can communicate with domain N 2 via three gateways G 1 , G 2 , G 3 . These gateways have sufficient knowledge to enable data packets to be sent between the two domains N 1 and N 2 by means of a routing protocol of the border gateway protocol (GBP) type, as defined in RFC 1771 of the Internet Engineering Task Force (IETF).
- GBP border gateway protocol
- Data packets are transmitted within a domain, e.g. from router R 1 to one of the gateways G 1 , G 2 , G 3 , for example, by means of a routing protocol such as the open shortest path first (OSPF) protocol as defined by RFC 2328 of said IETF.
- OSPF open shortest path first
- the domain N 1 is associated with a network management system TE.
- a network management system is a modular system combining various tools enabling the operator of a network or a network domain to manage various aspects thereof: handling breakdowns, traffic, call charging, etc.
- this network management system need be no more than a traffic engineering (TE) tool.
- TE traffic engineering
- the gateways G 1 , G 2 , and G 3 send information (respectively I 1 , I 2 , and I 3 ) to the network management system TE.
- This information may be sent periodically at the initiative of the gateways themselves, or it may be sent at the initiative of the network management system TE.
- This information is representative of the load and/or the status of each of the gateways.
- the network management system TE can thus be aware of the status of the various gateways, i.e. whether they are operational or not, and how heavily they are loaded.
- the network management system TE can:
- gateways suitable for use for inter-domain transmission can exclude any gateways that have failed, e.g. because of a hardware or software breakdown;
- gateways put the gateways in an order, e.g. as a function of their respective loadings and/or capacities.
- Ordering may be done in such a manner that the gateway having the greatest amount of availability is at the top of the list, and so on down to the last gateway which is the least available gateway.
- the availability of each gateway can depend on its capacity, since, in practice, each gateway may be of a different model, or indeed from a different manufacturer.
- Availability may also depend on the loading of each gateway which is a function of the real traffic being conveyed by the gateways. This loading is sent directly by the gateways G 1 , G 2 , and G 3 by means of the information I 1 , I 2 , and I 3 .
- the network management system TE also has means for sending the address of one or more of these gateways to the domain name server DNS associated with the domain N 1 .
- the network management system TE sends only the address of the “best” gateway to the domain name server DNS.
- This address can be transmitted to the domain name server by means of a dynamically updated command.
- This dynamically updated command may, for example, be the “DNS update” command as defined by IETF's RFC 2136 entitled “Dynamic update in the domain name system”.
- This dynamic update command enables apparatus outside the domain name server DNS to modify the internal tables of the DNS.
- it makes it possible to add a correspondence between a symbolic name corresponding to domain N 2 and the address of the gateway as determined by the network management system TE.
- the network management system TE can send a new address regularly, whenever conditions relating to the gateways G 1 , G 2 , and G 3 change. For example, if it finds out that one of the gateways has ceased to operate, it can then transmit the address of a new gateway to the domain name server DNS. Similarly, if the share of loading between the gateways varies, it can likewise transmit the address of another gateway.
- the router R 1 seeks to send a data packet to the domain N 2 it begins by sending a request to the domain name server DNS, which request includes a symbolic name corresponding to the domain N 2 .
- the domain name server DNS then consults its internal tables. Because of the updating mechanism implemented by the network management system, the domain name server DNS possesses the address of the gateway which is the “best” at a given instant.
- the domain name server DNS thus sends the address of the “best” gateway to the router R 1 using the usual mechanism for communication between routers and domain name servers.
- the router R 1 can then send the data packet to the domain N 2 , using the gateway that is considered to be the “best” by the network management system at that given instant.
- the gateway then sends the data packet to the router R 2 which can forward it into the domain N 2 .
- the network management system TE sends the addresses of a plurality of gateways to the domain name server in the form of a list.
- This list may be ordered prior to being sent to the domain name server DNS.
- the criteria selected for ordering the gateways may be their respective loadings and/or their respective available resources, in the same manner as is used for determining the “best” gateway in the first embodiment.
- the optionally ordered list of gateway addresses can be transmitted by means of a dynamic update command, e.g. of the “DNS update” type in compliance with IETF's RFC 2136.
- the internal tables of the server can then have a type of entry which consists in establishing a relationship between a symbolic name and a list of addresses.
- a router R 1 seeking to transmit a data packet to the domain N 2 begins by sending a request to the domain name server DNS containing a symbolic name corresponding to the domain N 2 .
- the domain name server DNS then sends the list associated with the symbolic name contained in the request.
- the router R 1 then has a list of available gateways enabling it to access the domain N 2 .
- Its selection may consist merely in using the first address in the list.
- This method of operating enables the router R 1 to have the complete list of available gateways immediately. Thus, if the first gateway should become unavailable in the time interval concerned, or if the route between said router R 1 and the gateway were to be wrongly configured, it is then easy for the router R 1 to turn to the following gateway in the list without needing to interrogate the domain name server again.
Abstract
A network management system having means for obtaining information about equipment in the network, some of said equipment being constituted by gateways suitable for enabling traffic to be sent out from said network, the system including means for sending, to the domain name server associated with said network, the address(es) of one or more of said gateways as determined on the basis of said information.
Description
- The present invention relates to sending data packets out from a data network. It applies particularly well to Internet type networks.
- When a node of a network seeks to send a data packet out from its own network, the data packet is sent via a gateway. Conventionally, the gateway is a border router which has means for communicating both with routers that are internal to the network in question, and with routers of other networks, generally other border routers.
- The node originating transmission of the data packet therefore needs to know the address of the border router gateway.
- This address may be known either by configuration, or by interrogating a domain name server (DNS).
- It can thus be understood that this gateway plays a critical role in sending data packets between two domains.
- As a result, the gateway must be capable of handling all of the traffic sent between the two domains. This traffic can be large and can lead to the gateway becoming overloaded, with the consequence of a reduction in transmission performance between the two domains.
- In addition, the gateway may suffer a hardware or software failure, and no longer be capable of sending data packets from one domain to another. In such a situation, traffic becomes impossible between the two domains.
- The object of the invention is to solve that pair of problems by proposing that a plurality of gateways be arranged to send data packets between the two domains.
- More precisely, the invention provides a network management system having means for obtaining information about equipment in the network, some of the equipment being constituted by gateways suitable for enabling traffic to be sent out from the network. The network management system includes means for sending, to the domain name server associated with the network, the address(s) of one or more of said gateways as determined on the basis of said information.
- In an embodiment of the invention, said means are arranged to order a list of gateways prior to sending the list to the domain name server.
- In an embodiment of the invention, said means implement a dynamic update command to send the address(es). This command may be designed to contain a list of addresses. For example, it may be a command of the “DNS update” type in accordance with RFC 2136.
- Thus, at any given moment, either the domain name server or the router originating the transmission can decide on the “best” gateway for allowing data packets to be sent to the second domain. This makes it possible to avoid sending data packets via a gateway that has failed or that is overloaded. It is also possible to spread loading over a set of available gateways.
- The invention and its advantages appear more clearly from the following description given with reference to the sole accompanying Figure which shows an embodiment of the invention.
- In the sole Figure, a router R1 of domain N1 can communicate with domain N2 via three gateways G1, G2, G3. These gateways have sufficient knowledge to enable data packets to be sent between the two domains N1 and N2 by means of a routing protocol of the border gateway protocol (GBP) type, as defined in RFC 1771 of the Internet Engineering Task Force (IETF).
- Data packets are transmitted within a domain, e.g. from router R1 to one of the gateways G1, G2, G3, for example, by means of a routing protocol such as the open shortest path first (OSPF) protocol as defined by RFC 2328 of said IETF.
- In conventional manner, the domain N1 is associated with a network management system TE.
- A network management system is a modular system combining various tools enabling the operator of a network or a network domain to manage various aspects thereof: handling breakdowns, traffic, call charging, etc.
- In the context of the present invention, this network management system need be no more than a traffic engineering (TE) tool.
- The gateways G1, G2, and G3 send information (respectively I1, I2, and I3) to the network management system TE. This information may be sent periodically at the initiative of the gateways themselves, or it may be sent at the initiative of the network management system TE.
- This information is representative of the load and/or the status of each of the gateways. The network management system TE can thus be aware of the status of the various gateways, i.e. whether they are operational or not, and how heavily they are loaded.
- As a function of this information, the network management system TE can:
- select gateways suitable for use for inter-domain transmission. For this purpose, the network management system can exclude any gateways that have failed, e.g. because of a hardware or software breakdown;
- put the gateways in an order, e.g. as a function of their respective loadings and/or capacities.
- Ordering may be done in such a manner that the gateway having the greatest amount of availability is at the top of the list, and so on down to the last gateway which is the least available gateway. The availability of each gateway can depend on its capacity, since, in practice, each gateway may be of a different model, or indeed from a different manufacturer. Availability may also depend on the loading of each gateway which is a function of the real traffic being conveyed by the gateways. This loading is sent directly by the gateways G1, G2, and G3 by means of the information I1, I2, and I3.
- The network management system TE also has means for sending the address of one or more of these gateways to the domain name server DNS associated with the domain N1.
- In a first embodiment of the invention, the network management system TE sends only the address of the “best” gateway to the domain name server DNS. This address can be transmitted to the domain name server by means of a dynamically updated command. This dynamically updated command may, for example, be the “DNS update” command as defined by IETF's RFC 2136 entitled “Dynamic update in the domain name system”.
- This dynamic update command enables apparatus outside the domain name server DNS to modify the internal tables of the DNS. In particular, it makes it possible to add a correspondence between a symbolic name corresponding to domain N2 and the address of the gateway as determined by the network management system TE.
- The network management system TE can send a new address regularly, whenever conditions relating to the gateways G1, G2, and G3 change. For example, if it finds out that one of the gateways has ceased to operate, it can then transmit the address of a new gateway to the domain name server DNS. Similarly, if the share of loading between the gateways varies, it can likewise transmit the address of another gateway.
- When the router R1 seeks to send a data packet to the domain N2it begins by sending a request to the domain name server DNS, which request includes a symbolic name corresponding to the domain N2.
- The domain name server DNS then consults its internal tables. Because of the updating mechanism implemented by the network management system, the domain name server DNS possesses the address of the gateway which is the “best” at a given instant.
- This address is associated by the above-described dynamic updating mechanism with the symbolic name contained in the request.
- The domain name server DNS thus sends the address of the “best” gateway to the router R1 using the usual mechanism for communication between routers and domain name servers. The router R1 can then send the data packet to the domain N2, using the gateway that is considered to be the “best” by the network management system at that given instant.
- The gateway then sends the data packet to the router R2 which can forward it into the domain N2.
- In a second embodiment of the invention, the network management system TE sends the addresses of a plurality of gateways to the domain name server in the form of a list.
- This list may be ordered prior to being sent to the domain name server DNS.
- The criteria selected for ordering the gateways may be their respective loadings and/or their respective available resources, in the same manner as is used for determining the “best” gateway in the first embodiment.
- In the same manner as described for the first embodiment, the optionally ordered list of gateway addresses can be transmitted by means of a dynamic update command, e.g. of the “DNS update” type in compliance with IETF's RFC 2136.
- In this embodiment, a new type of entry needs to be provided in the internal tables of the domain name server, and similarly the dynamic update command is to be designed to contain a list of addresses.
- The internal tables of the server can then have a type of entry which consists in establishing a relationship between a symbolic name and a list of addresses.
- Thereafter, the mechanism proceeds as in the prior art and as in the above description for the first embodiment: a router R1 seeking to transmit a data packet to the domain N2 begins by sending a request to the domain name server DNS containing a symbolic name corresponding to the domain N2. The domain name server DNS then sends the list associated with the symbolic name contained in the request.
- The router R1 then has a list of available gateways enabling it to access the domain N2.
- Its selection may consist merely in using the first address in the list.
- This method of operating enables the router R1 to have the complete list of available gateways immediately. Thus, if the first gateway should become unavailable in the time interval concerned, or if the route between said router R1 and the gateway were to be wrongly configured, it is then easy for the router R1 to turn to the following gateway in the list without needing to interrogate the domain name server again.
Claims (5)
1/ A network management system having means for obtaining information about equipment in the network, some of said equipment being constituted by gateways suitable for enabling traffic to be sent out from said network, the system including means for sending, to the domain name server associated with said network, the address(es) of one or more of said gateways as determined on the basis of said information.
2/ A network management system according to claim 1 , in which said means are arranged to order a list of gateways prior to sending the list to said domain name server.
3/ A network management system according to claim 1 , in which said means implement a dynamic update command to send said address(es).
4/ A network management system according. to the preceding claim, in which said command is designed to contain a list of addresses.
5/ A network management system according to claim 3 , in which said command is of the “DNS update” type in accordance with RFC 2136.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0202548A FR2836613B1 (en) | 2002-02-28 | 2002-02-28 | NETWORK MANAGEMENT SYSTEM FOR DETERMINING A COMMUNICATION GATEWAY BETWEEN DOMAINS |
FR0202548 | 2002-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030161336A1 true US20030161336A1 (en) | 2003-08-28 |
Family
ID=27676172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/367,924 Abandoned US20030161336A1 (en) | 2002-02-28 | 2003-02-19 | Network management system for designating a communications gateway between domains |
Country Status (5)
Country | Link |
---|---|
US (1) | US20030161336A1 (en) |
EP (1) | EP1341360B1 (en) |
AT (1) | ATE352166T1 (en) |
DE (1) | DE60311160T2 (en) |
FR (1) | FR2836613B1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006005991A1 (en) * | 2004-06-30 | 2006-01-19 | Nokia Inc. | Method and system for dynamic device address management |
WO2006063118A2 (en) * | 2004-12-07 | 2006-06-15 | Pure Networks, Inc. | Network management |
JP2008512906A (en) * | 2005-04-29 | 2008-04-24 | フアウェイジシュヨウシアンゴンシ | Method, system and apparatus for configuring interconnections between IP domains |
CN100407815C (en) * | 2006-02-24 | 2008-07-30 | 华为技术有限公司 | Method for insertion point obtaining insertion gateway address in mobile communication network |
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US20020105954A1 (en) * | 2001-02-02 | 2002-08-08 | Craig Peter Alan | Dynamic update proxy |
US6735617B1 (en) * | 2000-08-10 | 2004-05-11 | Bbnt Solutions Llc | Routing T-37 E-mail over an H 323 (VOIP) network |
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-
2002
- 2002-02-28 FR FR0202548A patent/FR2836613B1/en not_active Expired - Fee Related
-
2003
- 2003-01-31 EP EP03290240A patent/EP1341360B1/en not_active Expired - Lifetime
- 2003-01-31 DE DE60311160T patent/DE60311160T2/en not_active Expired - Lifetime
- 2003-01-31 AT AT03290240T patent/ATE352166T1/en not_active IP Right Cessation
- 2003-02-19 US US10/367,924 patent/US20030161336A1/en not_active Abandoned
Patent Citations (7)
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US6347085B2 (en) * | 1996-08-16 | 2002-02-12 | Netspeak Corporation | Method and apparatus for establishing communications between packet-switched and circuit-switched networks |
US20010039585A1 (en) * | 1999-12-06 | 2001-11-08 | Leonard Primak | System and method for directing a client to a content source |
US7133922B1 (en) * | 2000-08-07 | 2006-11-07 | The Hong Kong University Of Science And Technology | Method and apparatus for streaming of data |
US6735617B1 (en) * | 2000-08-10 | 2004-05-11 | Bbnt Solutions Llc | Routing T-37 E-mail over an H 323 (VOIP) network |
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8065408B2 (en) | 2004-06-30 | 2011-11-22 | Nokia, Inc. | Method and system for dynamic device address management |
US20060047803A1 (en) * | 2004-06-30 | 2006-03-02 | Nokia Inc. | Method and system for dynamic device address management |
WO2006005991A1 (en) * | 2004-06-30 | 2006-01-19 | Nokia Inc. | Method and system for dynamic device address management |
WO2006063118A2 (en) * | 2004-12-07 | 2006-06-15 | Pure Networks, Inc. | Network management |
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JP4937913B2 (en) * | 2005-04-29 | 2012-05-23 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | Method, system and apparatus for configuring interconnections between IP domains |
AU2006243577B2 (en) * | 2005-04-29 | 2009-05-21 | Huawei Technologies Co., Ltd. | Method, system and device for implementing interconnection between IP domains |
US20080159518A1 (en) * | 2005-04-29 | 2008-07-03 | Huawei Technologies Co., Ltd. | Method, System And Device For Implementing Interconnection Between Ip Domains |
JP2008512906A (en) * | 2005-04-29 | 2008-04-24 | フアウェイジシュヨウシアンゴンシ | Method, system and apparatus for configuring interconnections between IP domains |
US9525583B2 (en) | 2005-04-29 | 2016-12-20 | Huawei Technologies Co., Ltd. | Method, system and device for implementing interconnection between IP domains |
US20170070477A1 (en) * | 2005-04-29 | 2017-03-09 | Huawei Technologies Co., Ltd. | Method, System and Device for Implementing Interconnection Between IP Domains |
US9906489B2 (en) * | 2005-04-29 | 2018-02-27 | Huawei Technologies Co., Ltd. | Method, system and device for implementing interconnection between IP domains |
CN100407815C (en) * | 2006-02-24 | 2008-07-30 | 华为技术有限公司 | Method for insertion point obtaining insertion gateway address in mobile communication network |
Also Published As
Publication number | Publication date |
---|---|
FR2836613A1 (en) | 2003-08-29 |
EP1341360A1 (en) | 2003-09-03 |
ATE352166T1 (en) | 2007-02-15 |
FR2836613B1 (en) | 2004-06-18 |
DE60311160D1 (en) | 2007-03-08 |
DE60311160T2 (en) | 2007-12-13 |
EP1341360B1 (en) | 2007-01-17 |
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Owner name: ALCATEL, FRANCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PREGUICA, CHRISTOPHE;GALAND, DAMIEN;REEL/FRAME:013784/0919 Effective date: 20030123 |
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